information producers, performs system engineering, audits SIPs to ensure compliance with submission agreements, develops policies and standards. It handles customer service and acts as the interface between Management and the Designated Community in the OAIS environment. Preservation Planning function: supports all tasks to keep the archive material accessible and understandable over long terms even if the original computing system becomes obsolete, e.g. development of detailed preservation/migration plans, technology watch, evaluation and risk analysis of content and recommendation of update and migration. Access function: This function includes the user interface that allows users to retrieve information from the archive. It generates a DIP from the relevant AIP and delivers it to the customer who has requested the information. Adoption Although originally developed by the Consultative Committee for Space Data Systems, a body dedicated to overseeing space agencies, as digital preservation has become a discipline unto itself, the OAIS has become the standard model for digital preservation systems at many institutions and organizations. OAIS-compliance has been a stated fundamental design requirement for major digital preservation and repository development efforts at the National Archives and Records Administration, Library of Congress, British Library, Bibliothèque nationale de France, National Library of the Netherlands, the Digital Curation Centre in the UK, OCLC (the Online Computer Library Center), the JSTOR (Journal Storage) scholarly journal archive, as well as several university library systems. Centre of Excellence for Digital Preservation, C-DAC, India has implemented OAIS for National Cultural Audiovisual Archive (NCAA) which has been certified as Trusted Digital Repository as per ISO 16363: 2012 during November 2017. This initiative was a part of Indian National Digital Preservation Program (NDPP). The OAIS has been the basis of numerous prominent digital preservation initiatives and standards including the Preservation Metadata: Implementation Strategies working group and the Trustworthy Repositories Audit & Certification (TRAC) document from OCLC. which was an initial draft of, and subsequently superseded by, CCSDS 652.1-M-2 of the Consultative Committee for Space Data Systems; this text is identical to ISO 16363:2012 which forms the basis of the ISO audit and certification of Trustworthy Repositories, more details about which are available here. The ISO 19165:1-2018 recommends the use of the Open Packaging Conventions to implement the Geospatial Package. Software architecture model As part of #WeMissiPres, Frank Obermeit, a computer scientist at the State Archives of Saxony-Anhalt, Germany, presented a software architecture model that fully implements the Open Archival Information System (OAIS) reference